Dog DiseasesDogsPetsParvovirus, CanineHerpesvirus 1, CanidPositron-Emission TomographyHepatitis, Infectious CanineParvoviridae InfectionsAdenoviruses, CanineFluorodeoxyglucose F18RadiopharmaceuticalsAnimal Population GroupsAmprolium4-HydroxycoumarinsTomography, Emission-ComputedFructansCestode InfectionsFluorine RadioisotopesAnimals, NewbornCerium IsotopesCellulitisLarva Migrans, VisceralMultimodal ImagingEnteritisFatal OutcomeGastrointestinal DiseasesAnimals, SucklingCat DiseasesTomography, X-Ray ComputedCoronavirus InfectionsForelimbWeaningSubtraction TechniqueCatsOxygen RadioisotopesCopper RadioisotopesBlood Gas AnalysisRadioactive TracersLactationSensitivity and SpecificityHistocytochemistryFecesRadiochemistryAnimal Nutritional Physiological PhenomenaImage Processing, Computer-AssistedReproducibility of ResultsNitrogen RadioisotopesAge FactorsImage Interpretation, Computer-AssistedKidneyTime FactorsDihydroxyphenylalaninePhantoms, ImagingPregnancyAnimals, DomesticBrainGallium RadioisotopesWhole-Body CountingTissue DistributionMagnetic Resonance ImagingMicroscopy, ElectronAgingBehavior, AnimalImage EnhancementDideoxynucleosidesArtifactsSequence Analysis, DNADietPolymerase Chain ReactionNuclear MedicineDeoxyglucoseRacloprideRubidium RadioisotopesLiverMolecular Sequence DataTomography, Emission-Computed, Single-PhotonThiosemicarbazonesIsotope LabelingLutetiumGermaniumMetabolic Clearance RateHeterocyclic Compounds, 1-RingOrganometallic CompoundsGamma CamerasNeoplasm StagingNeoplasmsMisonidazoleRadioisotopesBromine RadioisotopesFeasibility StudiesLung NeoplasmsCerebrovascular CirculationMolecular ImagingAlgorithmsRetrospective StudiesImaging, Three-DimensionalDiagnostic ImagingIodine RadioisotopesSalicylamidesRespiratory-Gated Imaging Techniques